Thailand Securities and Exchange Commission revises advertising rules for securities and derivatives operators with new controls on service providers and social media disclosures

The Thailand Securities and Exchange Commission has amended its rules on advertisements by securities and derivatives business operators to keep oversight comprehensive and aligned with newer advertising formats and shifting investor behaviour, issuing new notifications to implement the changes. The revised framework sets criteria and procedures for selecting advertising service providers with sufficient readiness and credibility, requires a written agreement with service providers that enables compliance with advertising rules, and makes business operators responsible for supervising ad preparation and dissemination, including reviewing or approving content before publication and overseeing service providers’ conduct. It also requires additional warnings in descriptions or captions for advertisements disseminated through social media, and where service providers are used, mandates clear disclosure across channels and formats that content is sponsored by the business operator unless the format is self-evidently an advertisement. The notifications were published in the Royal Gazette on 19 January 2026 and took effect on 16 January 2026, with a transition for business operators that had advertising agreements with service providers in place before the effective date, which may continue under the previous rules.